A3446
Fig. 18: ADDR displayed
3.
Use the UP or DOWN key to select the address.
4.
Press the
[right arrow key] to acknowledge the setting and
move to the next menu, or the EXIT key to exit the menu and
return to AUTO.
6.5.5 Configuring the alarm
The DULCO turb C features two independently programmable
alarm relays. 3 points of information must be entered to fully con‐
figure the 2 alarms:
n
Alarm function: HI, LO, OFF or ERROR
n
Alarm limit value (limit value at which the alarm is activated)
n
Alarm delay time:
– how long the limit value must be exceeded before the
alarm is activated,
– and the period of time before the alarm is reset.
Alarm trigger in the event of an internal system
error
The relays trigger an alarm in the event of an
internal system error, regardless of the turbidity
values set.
You can either switch off the alarm (OFF) or program it so that it
works in accordance with one of the following modes:
n
HI alarm: The relay triggers the alarm when the turbidity value
exceeds the programmed alarm limit value for a minimum
specified time
n
LO alarm: The relay triggers the alarm when the turbidity value
drops below the programmed alarm limit value for a minimum
specified time
n
ERROR alarm: The relay triggers the alarm when an internal
system error occurs
The turbidity threshold at which an alarm is triggered is referred to
as the
‘Alarm setpoint’ . You can configure the alarm setpoint
across the entire display range of the device in increments of 0.01
NTU.
Function of the alarm
Alarm setpoint
Commissioning
36